76 LABORATORY METHODS OF 



T. S. SPINAL, CORD CAT. 



1, Anterior median fissure; 2, posterior median fissure; 

 3, anterior roots; 4, posterior roots; 5, central canal; 6, 

 anterior gray commissure; 7, posterior gray commissure; 

 8, anterior white commissure; 9, posterior white commis- 

 sure; 10, anterior columns; 11, posterior lateral column; 

 12, posterior column; 13, substantia gelatinosa; 14, 15, 16, 

 17, 18, groups of motor cells; 19, column of Burdoch; 20, 

 column of Goll. 



matter is in the shape of the letter H. The surface of 

 the cord is divided into four areas: anterior, pos- 

 terior and two lateral. On dividing the cord into 

 halves, from before backwarc)s ? and then dividing 



